There was a bunch of iron in the proto dust cloud that formed this solar system(i pick on iron because it is a nice infliction point past which you get no energy from fusion, but really include all of the middle stable elements here), as the dust cloud collapsed it formed an iron core in all the planets, and many asteroids. but no core in the sun, explain how that is possible.
really, I expect at minimum an earth sized iron core in the sun, it is probably much more.
really, I expect at minimum an earth sized iron core in the sun, it is probably much more.